EP 3835783 A1 20210616 - PHOTOIONIZATION DETECTOR AUTOMATED ZERO LEVEL CALIBRATION
Title (en)
PHOTOIONIZATION DETECTOR AUTOMATED ZERO LEVEL CALIBRATION
Title (de)
AUTOMATISCHE NULLPEGELKALIBRIERUNG EINES PHOTOIONISATIONSDETEKTORS
Title (fr)
ÉTALONNAGE AUTOMATIQUE DU NIVEAU ZÉRO POUR DÉTECTEUR DE PHOTO-IONISATION
Publication
Application
Priority
- EP 21153809 A 20160729
- EP 16753755 A 20160729
- US 2016044614 W 20160729
Abstract (en)
A method of detecting gas with a photoionization detector, PID, system (1, 100), comprising: determining and storing, by a controller (2, 102), a zero level of a photoionization detector (4, 104, 106, 108, 112, 116), using ambient air inflow when an ultraviolet lamp (106) is in a turned OFF state, wherein the stored zero level is based on an ambient temperature; sampling, by the controller (2, 102), an output of a detector electrode (108) of the photoionization detector (4, 104, 106, 108, 112, 116) when the ultraviolet lamp (106) is in a turned ON state; comparing the sampled output of the detector electrode (108) to the stored zero level to determine if a threshold concentration of a gas is present, wherein the photoionization detector system (1,100) senses ambient temperature and algorithmically adapts the stored zero level based on changes in the sensed ambient temperature.
IPC 8 full level
G01N 30/64 (2006.01); G01N 27/66 (2006.01); G01N 33/00 (2006.01); G01N 30/86 (2006.01)
CPC (source: CN EP US)
G01N 27/66 (2013.01 - EP US); G01N 30/64 (2013.01 - CN EP US); G01N 33/0006 (2013.01 - EP US); G01N 33/0047 (2013.01 - US); G01N 30/8665 (2013.01 - EP US); G01N 2030/642 (2013.01 - CN EP US)
Citation (search report)
- [A] WO 9427141 A1 19941124 - RAE SYSTEMS INC [US]
- [A] US 5773833 A 19980630 - HSI PETER C [US]
- [A] EP 2458375 A1 20120530 - GEN ELECTRIC [US]
- [A] WO 2011090433 A1 20110728 - R2CD HOLDINGS PTE LTD [SG], et al
- [A] US 6313638 B1 20011106 - SUN HONG T [US], et al
- [A] US 6225633 B1 20010501 - SUN HONG T [US], et al
- [A] UNKNOWN: "Chapter 6 Photoionization Detectors", 19 January 2005 (2005-01-19), pages 73 - 81, XP055320320, Retrieved from the Internet <URL:https://web.archive.org/web/20050119175603/http://intlsensor.com/pdf/photoionization.pdf> [retrieved on 20161117]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2018022072 A1 20180201; CN 109073612 A 20181221; CN 109073612 B 20220329; CN 114609314 A 20220610; EP 3427048 A1 20190116; EP 3427048 B1 20210901; EP 3835783 A1 20210616; EP 3835783 B1 20240717; EP 4435429 A2 20240925; US 10782273 B2 20200922; US 10969371 B2 20210406; US 11480554 B2 20221025; US 11714073 B2 20230801; US 2019113491 A1 20190418; US 2020371077 A1 20201126; US 2021181170 A1 20210617; US 2022390424 A1 20221208
DOCDB simple family (application)
US 2016044614 W 20160729; CN 201680085323 A 20160729; CN 202210338675 A 20160729; EP 16753755 A 20160729; EP 21153809 A 20160729; EP 24184897 A 20160729; US 201616090391 A 20160729; US 202016988180 A 20200807; US 202117176542 A 20210216; US 202217820608 A 20220818